Support delete operation in kubeops function

[PrasadG193]

Signed-off-by: Prasad Ghangal prasad.ghangal@gmail.com

Change Overview

Add support for delete operation in kubeops function. The resource details can be provided as objectReference

    - func: KubeOps
      name: deleteDeploy
      args:
        operation: delete
        objectReference:
          apiVersion: "{{ .Phases.createDeploy.Output.apiVersion }}"
          group: "{{ .Phases.createDeploy.Output.group }}"
          resource: "{{ .Phases.createDeploy.Output.resource }}"
          name: "{{ .Phases.createDeploy.Output.name }}"
          namespace: "{{ .Phases.createDeploy.Output.namespace }}"

Pull request type

Please check the type of change your PR introduces:

• 🚧 Work in Progress
• 🌈 Refactoring (no functional changes, no api changes)
• 🐹 Trivial/Minor
• 🐛 Bugfix
• 🌻 Feature
• 🗺️ Documentation
• 🤖 Test

Test Plan

$ go test -check.f="KubeOpsSuite" .
OK: 2 passed
PASS
ok github.com/kanisterio/kanister/pkg/function 31.797s

• 💪 Manual
• ⚡ Unit test
• 💚 E2E

[pavannd1]

LGTM 👍🏼